Logging in Python command line scripts

cmdline.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import argparse
import logging
import sys

log = logging.getLogger(__name__)

def main(args=None):
    parser = argparse.ArgumentParser()
    parser.add_argument('-v', '--verbose', action="store_true",
        help="Log debugging info to standard error output.")

    args = parser.parse_args(sys.argv[1:] if args is None else args)

    logging.basicConfig(level=logging.DEBUG if args.verbose else logging.INFO,
                        format="%(levelname)s: %(message)s")
    
    # Your script here...
    log.info("Message at normal verbosity")
    log.debug("Message at enhanced verbosity (with -v command line switch)")
    return 0

if __name__ == '__main__':
    sys.exit(main(sys.argv[1:]) or 0)